From Digital Manga:
High school teacher, Kurosawa falls in love with his truant student, Kon. The two embark on an affair and neither can bring themselves to break it off. Kon finds that she's no longer content with keeping their relationship hidden in the shadows and sets up a seductive bet that if she wins, then Kurosawa has to take her out on a date.
Anthology featuring 3 more story arcs: A student and teacher who are inseparable, a brother with an eye-patch cat-eared wearing sister demanding her hymen, and a member of the Film Society Club is attracted to the new member.